Improvement in machinery for rolling metal



W. GEORGE & W. F. DURFEE. Machinery for Rolling Metal.

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' Patented May 20,1873.

AM PH OTO-LITHOGRAFHI 0 C0 MX DEBORAH PROCESS? UNITED STATES PATENTOFFICE WILLIAM GEORGE AND WILLIAM F. DURFEE, OF PHILADELPHIA, PA.

IMPROVEMENT IN MACHINERY FOR ROLLING METAL.

Specification forming part of Letters Patent No. 139,000, dated May 20,1873; application filed February 3, 1873.

To all whom it may concern:

Be it known that We, WILLIAM GEORGE and WILLIAM F. DURFEE, ofPhiladelphia, Pennsylvania, have invented certain Improvements inMachinery and Appliances for Handling Metal at the Rolls of aRolling-Mill, of which the following is a specification:

Our invention relates to an improved method of constructing andoperating the tables at the front and back of the rolls of arollingmill, on which the metal is placed before it passes through therolls of the rolling-mill, and on which it is received after passingthrough said rolls.

These tables, as heretofore constructed, have been provided with anumber of parallel roll- 'ers, which were caused to revolve either bypower applied to their axes or by the rolling friction between theirsurfaces and the surface of the piece of metal to be rolled when saidpiece of metal was pushed by men employed for that purpose. In the firstcase considerable complicated machinery is required, and in the lastcase a large number of men.

Now, the object of our invention is to great- 1 y simplify themachinery, and atthe same time to dispense with a large part of themanual labor required.

Now, ourinvention consists in so constructing the tables in question,(which are shown at A and B,1 igs. 1 and 2,in the drawing hereuntoannexed and forming part of this specification that when a piece ofmetal, M, is placed upon the rollers X of the table A in front of therolls It It of the rolling-mill its natural tendency, in obedience toits gravity, will be to move upon the rollers X of the table A towardthe rolls B R of the rolling-mill, between which rolls the metal M willthen pass and be received by the rollers 3 of the table B at the back ofthe rolls R It of the rolling-mill,which table B is so inclined thatwhen the piece of metal M has left the rolls R B of the rollingmill andis received upon the rollers 3 of the table B its natural tendency, inobedience to its gravity, will be to roll upon the rollers y of thetable B from the rolls R B of the rolling-mill. The tables A B are thenraised simultaneously by any appropriate mechanismsuch as asteam-cylinder, G, or its equivalentin such a way that they are causedto approach the rolls of the rolling-mill, and to have their respectiveinclinations reversed, so that the natural .tendency of the. piece ofmetal M, resting on the rollers 1 of the table B, will be, in obedienceto its gravity, to roll upon said rollers toward the rolls R It of therolling-mill, and to pass between the top and middle roll of therolling-mill in the case of what is known as a threehigh mill, or overthe top roll of the rolling-mill in the case of what is known as atwo-high mill, which is the form represented in the drawing; and then,after passing between or over the rolls of the rollihgmill,

the piece of metal M will be received by the rollers a: of the table Aon the front side of the rolls of the rolling-mill, which tableA,together with the table B, are immediately returned to their originalposition, as shown in the drawing, and the succession of operationsdescribed above are repeated until the piece of metal M has received itsproper reduction and elongation by the rolls of the rolling-mill; and,in case the inclinations of the tables A B are properly regulated, themovement of the piece of metal M toward and from the rolls R R of therolling-mill will be accomplished by its gravity, requiring only manualassistance sufficient to regulate its rate of movement and to insure itsentering (in the case of grooved rollers) the proper groove in the rollsof the rolling-mill though we do not confine our invention torolling-mills with grooved rolls-,but claim its application to thehandling of metal at rolling-mills of every description that require theuse of tables for handling the metal being operated upon.

The manner in which the tables A B are caused to vary their inclinationas they rise and fall, and at the same time to approach the rolls of therolling-mill R R, is as follows: the tables A B are supported on bars 22, which are connected to'the tables A B and to the arms 0 0, by pins,or their equivalents, so that the said bars 2 2 can move about saidpins, or their equivalents, as centers of motion, and the character andextent of said motion is dc termined and regulated by the radius-bars r,T, which are made adjustable by being divided into two parts, with aslot in each part,bolts being passed through said parts in the slots,

and so coupling them together by inducing friction between the two partsof the radiusbars 1 r by screwing up the bolts 1) b, which confine thetwo parts, 12 p, of the radius-bars together. (See Figs. 3 and 4.)

This construction, or some equivalent one, of the radius-bars r r is forthe purpose of preventing breakage caused by the piece of metal beingrolled as it passes through or over the rolls B B of the rolling-millcoming in accidental contact with the tables A B, in which case, if thefriction between the two parts, 1; p, of the radius-bars r 1", isproperly adjusted they will slip upon each other, and the table,withwhich such contact occurs,will then move away from the rolls uninjured.

This is but one way of accomplishing this result; many other well-knowndevices could be used.

The tables A B are caused to vary their inclination as they rise andfall as follows: The bars 2 z are attached by their lower ends to theextremities of arms 0 0, which arms are caused to vibrate through afixed angle by means of any suitable mechanism; but arms 0 are madelonger than the arms 0, so that the ends of the tables A B, which areattached to the arms 0 by the bars 2:, rise and fall faster than theends which are attached to the arms 0 by the bars 2.

The table A, in front of the rolls of the rolling-mill, is made withre-entrant angles 0 d e, as shown,for the purpose of enabling the menemployed on the front side of the rolls to approach nearer to said rollsin case the piece of metal M being operated upon is so small that itwould be inconvenient or impossible for the men to guide the same ifthey were obliged to stand at the extreme end 0 c of the table A. Now,

What we claim as our invention, and desire to secure by Letters Patent,is

1. For movement of the tables at the front and back of the rolls of arolling-mill, the lever-arms 0 and 0, combined with the rods :2 and zand the radius-bars 1" *r, or their equivalents, so that the said tablesvary their inclination as they rise and fall, and at the same timeapproach and recede from the rolls of the rolling-mill, the wholeoperating substantially in the manner, and for the purpose hereinbeforedescribed.

2. The construction of the tables of a rolling-mill with re-entrentangles, substantially in the manner hereinbefore described.

WILLIAM GEORGE. WILLIAM FRANKLIN DURFEE.

Witnesses:

lVIARIOTT G. SMYTH, J OHN M. NEWBoLD.

